30 MILK-ANALYSIS. 



The distillates which subsequently come over are charged 

 with the ammonia arising from the destruction of the 

 caseine. 



The ammonia is to be measured by means of the Nessler 

 test, which is now very well known. The details of the meas- 

 urement of ammonia will be understood by all persons who 

 are in the habit of working the water process of Wanklyn, 

 Chapman, and Smith, and it is unnecessary to enter into 

 them here. 



Every one part by weight of oaseine gives, treated in this 

 manner, 0.065 part of ammonia. The yield of " albuminoid 

 ammonia " from 100 c. c. of genuine milk is 0.26 gram- 

 mes. 



It is only by persons who work the ammonia process of 

 water-analysis, and only in laboratories where arrangements 

 are made for that process, that the convenience of thia deter- 

 mination of caseins will be appreciated. 



